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Date: Mon, 25 Apr 2022 20:21:29 +0800
From: Jeffle Xu <jefflexu@...ux.alibaba.com>
To: dhowells@...hat.com, linux-cachefs@...hat.com, xiang@...nel.org,
chao@...nel.org, linux-erofs@...ts.ozlabs.org
Cc: torvalds@...ux-foundation.org, gregkh@...uxfoundation.org,
willy@...radead.org, linux-fsdevel@...r.kernel.org,
joseph.qi@...ux.alibaba.com, bo.liu@...ux.alibaba.com,
tao.peng@...ux.alibaba.com, gerry@...ux.alibaba.com,
eguan@...ux.alibaba.com, linux-kernel@...r.kernel.org,
luodaowen.backend@...edance.com, tianzichen@...ishou.com,
fannaihao@...du.com, zhangjiachen.jaycee@...edance.com,
zhujia.zj@...edance.com
Subject: [PATCH v10 07/21] cachefiles: add tracepoints for on-demand read mode
Add tracepoints for on-demand read mode. Currently following tracepoints
are added:
OPEN request / COPEN reply
CLOSE request
READ request / CREAD reply
write through anonymous fd
release of anonymous fd
Signed-off-by: Jeffle Xu <jefflexu@...ux.alibaba.com>
Acked-by: David Howells <dhowells@...hat.com>
---
fs/cachefiles/ondemand.c | 7 ++
include/trace/events/cachefiles.h | 174 ++++++++++++++++++++++++++++++
2 files changed, 181 insertions(+)
diff --git a/fs/cachefiles/ondemand.c b/fs/cachefiles/ondemand.c
index 3470d4e8f0cb..a41ae6efc545 100644
--- a/fs/cachefiles/ondemand.c
+++ b/fs/cachefiles/ondemand.c
@@ -30,6 +30,7 @@ static int cachefiles_ondemand_fd_release(struct inode *inode,
xa_unlock(&cache->reqs);
xa_erase(&cache->ondemand_ids, object_id);
+ trace_cachefiles_ondemand_fd_release(object, object_id);
cachefiles_put_object(object, cachefiles_obj_put_ondemand_fd);
cachefiles_put_unbind_pincount(cache);
return 0;
@@ -55,6 +56,7 @@ static ssize_t cachefiles_ondemand_fd_write_iter(struct kiocb *kiocb,
if (ret < 0)
return ret;
+ trace_cachefiles_ondemand_fd_write(object, file_inode(file), pos, len);
ret = __cachefiles_write(object, file, pos, iter, NULL, NULL);
if (!ret)
ret = len;
@@ -93,6 +95,7 @@ static long cachefiles_ondemand_fd_ioctl(struct file *filp, unsigned int ioctl,
if (!req)
return -EINVAL;
+ trace_cachefiles_ondemand_cread(object, id);
complete(&req->done);
return 0;
}
@@ -166,6 +169,7 @@ int cachefiles_ondemand_copen(struct cachefiles_cache *cache, char *args)
clear_bit(FSCACHE_COOKIE_NO_DATA_TO_READ, &cookie->flags);
else
set_bit(FSCACHE_COOKIE_NO_DATA_TO_READ, &cookie->flags);
+ trace_cachefiles_ondemand_copen(req->object, id, size);
out:
complete(&req->done);
@@ -213,6 +217,7 @@ static int cachefiles_ondemand_get_fd(struct cachefiles_req *req)
object->ondemand_id = object_id;
cachefiles_get_unbind_pincount(cache);
+ trace_cachefiles_ondemand_open(object, &req->msg, load);
return 0;
err_put_fd:
@@ -426,6 +431,7 @@ static int cachefiles_ondemand_init_close_req(struct cachefiles_req *req,
return -ENOENT;
req->msg.object_id = object_id;
+ trace_cachefiles_ondemand_close(object, &req->msg);
return 0;
}
@@ -452,6 +458,7 @@ static int cachefiles_ondemand_init_read_req(struct cachefiles_req *req,
req->msg.object_id = object_id;
load->off = read_ctx->off;
load->len = read_ctx->len;
+ trace_cachefiles_ondemand_read(object, &req->msg, load);
return 0;
}
diff --git a/include/trace/events/cachefiles.h b/include/trace/events/cachefiles.h
index 93df9391bd7f..d8d4d73fe7b6 100644
--- a/include/trace/events/cachefiles.h
+++ b/include/trace/events/cachefiles.h
@@ -673,6 +673,180 @@ TRACE_EVENT(cachefiles_io_error,
__entry->error)
);
+TRACE_EVENT(cachefiles_ondemand_open,
+ TP_PROTO(struct cachefiles_object *obj, struct cachefiles_msg *msg,
+ struct cachefiles_open *load),
+
+ TP_ARGS(obj, msg, load),
+
+ TP_STRUCT__entry(
+ __field(unsigned int, obj )
+ __field(unsigned int, msg_id )
+ __field(unsigned int, object_id )
+ __field(unsigned int, fd )
+ __field(unsigned int, flags )
+ ),
+
+ TP_fast_assign(
+ __entry->obj = obj ? obj->debug_id : 0;
+ __entry->msg_id = msg->msg_id;
+ __entry->object_id = msg->object_id;
+ __entry->fd = load->fd;
+ __entry->flags = load->flags;
+ ),
+
+ TP_printk("o=%08x mid=%x oid=%x fd=%d f=%x",
+ __entry->obj,
+ __entry->msg_id,
+ __entry->object_id,
+ __entry->fd,
+ __entry->flags)
+ );
+
+TRACE_EVENT(cachefiles_ondemand_copen,
+ TP_PROTO(struct cachefiles_object *obj, unsigned int msg_id,
+ long len),
+
+ TP_ARGS(obj, msg_id, len),
+
+ TP_STRUCT__entry(
+ __field(unsigned int, obj )
+ __field(unsigned int, msg_id )
+ __field(long, len )
+ ),
+
+ TP_fast_assign(
+ __entry->obj = obj ? obj->debug_id : 0;
+ __entry->msg_id = msg_id;
+ __entry->len = len;
+ ),
+
+ TP_printk("o=%08x mid=%x l=%lx",
+ __entry->obj,
+ __entry->msg_id,
+ __entry->len)
+ );
+
+TRACE_EVENT(cachefiles_ondemand_close,
+ TP_PROTO(struct cachefiles_object *obj, struct cachefiles_msg *msg),
+
+ TP_ARGS(obj, msg),
+
+ TP_STRUCT__entry(
+ __field(unsigned int, obj )
+ __field(unsigned int, msg_id )
+ __field(unsigned int, object_id )
+ ),
+
+ TP_fast_assign(
+ __entry->obj = obj ? obj->debug_id : 0;
+ __entry->msg_id = msg->msg_id;
+ __entry->object_id = msg->object_id;
+ ),
+
+ TP_printk("o=%08x mid=%x oid=%x",
+ __entry->obj,
+ __entry->msg_id,
+ __entry->object_id)
+ );
+
+TRACE_EVENT(cachefiles_ondemand_read,
+ TP_PROTO(struct cachefiles_object *obj, struct cachefiles_msg *msg,
+ struct cachefiles_read *load),
+
+ TP_ARGS(obj, msg, load),
+
+ TP_STRUCT__entry(
+ __field(unsigned int, obj )
+ __field(unsigned int, msg_id )
+ __field(unsigned int, object_id )
+ __field(loff_t, start )
+ __field(size_t, len )
+ ),
+
+ TP_fast_assign(
+ __entry->obj = obj ? obj->debug_id : 0;
+ __entry->msg_id = msg->msg_id;
+ __entry->object_id = msg->object_id;
+ __entry->start = load->off;
+ __entry->len = load->len;
+ ),
+
+ TP_printk("o=%08x mid=%x oid=%x s=%llx l=%zx",
+ __entry->obj,
+ __entry->msg_id,
+ __entry->object_id,
+ __entry->start,
+ __entry->len)
+ );
+
+TRACE_EVENT(cachefiles_ondemand_cread,
+ TP_PROTO(struct cachefiles_object *obj, unsigned int msg_id),
+
+ TP_ARGS(obj, msg_id),
+
+ TP_STRUCT__entry(
+ __field(unsigned int, obj )
+ __field(unsigned int, msg_id )
+ ),
+
+ TP_fast_assign(
+ __entry->obj = obj ? obj->debug_id : 0;
+ __entry->msg_id = msg_id;
+ ),
+
+ TP_printk("o=%08x mid=%x",
+ __entry->obj,
+ __entry->msg_id)
+ );
+
+TRACE_EVENT(cachefiles_ondemand_fd_write,
+ TP_PROTO(struct cachefiles_object *obj, struct inode *backer,
+ loff_t start, size_t len),
+
+ TP_ARGS(obj, backer, start, len),
+
+ TP_STRUCT__entry(
+ __field(unsigned int, obj )
+ __field(unsigned int, backer )
+ __field(loff_t, start )
+ __field(size_t, len )
+ ),
+
+ TP_fast_assign(
+ __entry->obj = obj ? obj->debug_id : 0;
+ __entry->backer = backer->i_ino;
+ __entry->start = start;
+ __entry->len = len;
+ ),
+
+ TP_printk("o=%08x iB=%x s=%llx l=%zx",
+ __entry->obj,
+ __entry->backer,
+ __entry->start,
+ __entry->len)
+ );
+
+TRACE_EVENT(cachefiles_ondemand_fd_release,
+ TP_PROTO(struct cachefiles_object *obj, int object_id),
+
+ TP_ARGS(obj, object_id),
+
+ TP_STRUCT__entry(
+ __field(unsigned int, obj )
+ __field(unsigned int, object_id )
+ ),
+
+ TP_fast_assign(
+ __entry->obj = obj ? obj->debug_id : 0;
+ __entry->object_id = object_id;
+ ),
+
+ TP_printk("o=%08x oid=%x",
+ __entry->obj,
+ __entry->object_id)
+ );
+
#endif /* _TRACE_CACHEFILES_H */
/* This part must be outside protection */
--
2.27.0
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